Theoretical study on concrete-filled steel tubes under static and variable repeated loadings

Aly, Tarek Kamal; Thayalan, P; Elchalakani, Mohamed; Patnaikuni, Indubhushan

doi:10.1016/j.jcsr.2009.08.005

Cited by 5 publications

(6 citation statements)

References 9 publications

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“…It is clear that after local buckling, plane sections no longer remain plane in the buckled regions, however, prior to this level of response, it is the opinion of the authors that strain compatibility between steel shell and core and linear strain profiles exist, and that usual analysis methods that rely on these assumptions can be employed, an assertion also reported and supported by the studies of Aly et al [25] and Elchalakani et al [9].…”

Section: Strain Compatibilitymentioning

confidence: 79%

Impact of D/t on seismic behavior of reinforced concrete filled steel tubes

Brown

Kowalsky

Nau

2015

Journal of Constructional Steel Research

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Section: Strain Compatibilitymentioning

confidence: 79%

Impact of D/t on seismic behavior of reinforced concrete filled steel tubes

Brown

Kowalsky

Nau

2015

Journal of Constructional Steel Research

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“…Taking the derivative of εs in formula (5), the mean strain rate s  of the specimen can be obtained as:…”

Section: Figure 4 Stress Wave Propagation Between Specimen and Barsmentioning

confidence: 99%

“…Under the ultimate load, the concrete may suddenly burst due to the high brittleness. After being reinforced by steel fibers, the high-strength concrete will have better strength, toughness and crack-resistance, and much lower brittleness [5]. In terms of material strength, the SFRHSC shelter layer enjoys a clear advantage over ordinary concrete shelter layer, making it a desirable tool to prevent penetration and impact in dynamical engineering.…”

Section: Introductionmentioning

confidence: 99%

Split-Hopkinson Pressure Bar Test and Numerical Simulation of Steel Fiber-reinforced High-strength Concrete

Ji¹,

Shi²,

He³

et al. 2019

RCMA

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The fabrication and optimization of the shelter layer are critical to the performance of the protective works. The novel shelter layer made of steel fiber-reinforced high-strength concrete (SFRHSC) is much more advantageous than that of ordinary concrete. This paper carries out a split-Hopkinson pressure bar (SHPB) test on the steel fiber and high-strength concrete, two main components of the SFRHSC, aiming to disclose the failure features and dynamic compressive strength of the SFRHSC under dynamic conditions. Specifically, the SFRHSC specimens with 0 %, 0.5 % and 1.0 % of steel fiber were subjected to impact compression test under the air pressures of 0.7, 0.9 and 1.0MPa, respectively. In addition, the impact compression process was also numerically simulated on the finite-element software LS-DYNA. The research results show that: the increase in strain rate pushed up the dynamic compressive strength of the SFRHSC, that is, the failure degree of the specimen was greatly enhanced by the strain rate; under the air pressure of 0.7MPa, the specimen with 1.0 % of steel fiber had the highest dynamic compressive strength (180.9MPa), 22.6 % higher than that of the specimen with no steel fiber; the numerical simulation reproduced the one-dimensional (1D) propagation of the stress wave in the bars, which proves the hypothesis of 1D elastic stress wave, and restaged the impact compression process on the SFRHSC, outputting results similar to the test data. Keywords: steel fiber-reinforced high-strength concrete (SFRHSC), impact compression, strain rate effect, numerical simulation Camouflaged layer Bursting layer Distribution layer Supporting structure Revue des Composites et des Matériaux Avancés

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“…Different loading conditions were employed to investigate the mechanical behaviour of CFST: static load (Dundu, 2012;Van Cao, 2019;Yang and Han, 2012), lateral cyclic load (Liu et al, 2018;Yang et al, 2009), impact load (Han et al, 2014;Qu et al, 2011;Xiao et al, 2009), load and thermal effects (Han et al, 2008;Song et al, 2010;Yin et al, 2006). However, in the literature, research on the behaviour of CFST under cyclic axial compression seems to be quite limited to a few studies (Aly et al, 2010a(Aly et al, , 2010bThayalan et al, 2009). Aly et al (2010b) conducted an analytical study on the behaviour of CFST columns under static and variable repeated loading.…”

Section: Introductionmentioning

confidence: 99%

“…However, in the literature, research on the behaviour of CFST under cyclic axial compression seems to be quite limited to a few studies (Aly et al, 2010a(Aly et al, , 2010bThayalan et al, 2009). Aly et al (2010b) conducted an analytical study on the behaviour of CFST columns under static and variable repeated loading. The results indicated that incremental collapse occurs in CFST columns subjected to variable repeated loading.…”

Section: Introductionmentioning

confidence: 99%

Experimental behaviour of concrete-filled steel tubes under cyclic axial compression

Cao

Nguyen

2019

Advances in Structural Engineering

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This study experimentally investigated the behaviour of concrete-filled steel tubes under cyclic axial compression. A total of 42 concrete-filled steel tube specimens of two groups were tested to failure. In each group, 18 specimens were subjected to three cyclic axial loading histories while three specimens were subjected to monotonic loading for comparison. The results indicated that concrete-filled steel tube specimens under cyclic axial compression failed in the form of buckling and still kept their form which was similar to the failure of specimens under monotonic loading. Effect of cyclic axial loading slightly reduced (approximately 2%–3%) the maximum stress but it increased 25% of the strain corresponding to the maximum stress. Loading and unloading moduli in post-peak stress phase were, respectively, about 70% and 85% higher than initial moduli because better interaction and confinement were resulted from the initial loading cycle. In addition, the absorbed energy exhibited a heavy dependence on strain and confinement while it was insignificantly affected by cyclic loading histories. Details and application of obtained experimental results are reported in this article.

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Theoretical study on concrete-filled steel tubes under static and variable repeated loadings

Cited by 5 publications

References 9 publications

Impact of D/t on seismic behavior of reinforced concrete filled steel tubes

Impact of D/t on seismic behavior of reinforced concrete filled steel tubes

Split-Hopkinson Pressure Bar Test and Numerical Simulation of Steel Fiber-reinforced High-strength Concrete

Experimental behaviour of concrete-filled steel tubes under cyclic axial compression

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